locutus/esm/php/array/array_reduce.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

export function array_reduce(aInput, callback, initial) {
    //  discuss at: https://locutus.io/php/array_reduce/
    // original by: Alfonso Jimenez (https://www.alfonsojimenez.com)
    //      note 1: Takes a function as an argument, not a function's name
    //   example 1: array_reduce([1, 2, 3, 4, 5], function (v, w){v += w;return v;})
    //   returns 1: 15
    let carry = typeof initial === 'undefined' ? null : initial;
    for (const value of aInput) {
        carry = callback(carry, value);
    }
    return carry;
}